The character Crinkly Wrinkly appears dressed as Finn from Adventure Time while heading to an "Ooold Folks Home".
Although the sentient Jethro vows to never leave his "brothers," Boxman eventually finds and removes him, though the other Jethros continue to cover for him. Production Context [S2E30] I Am Jethro
Due to a production line mishap involving a "glorb jam," a specific Jethro rolls off the assembly line with limbs, a soul, and the ability to think independently. The character Crinkly Wrinkly appears dressed as Finn
The Jethros eventually protect the sentient one by using an "I Am Spartacus" strategy—modifying him to look like a standard bot to hide him from Lord Boxman. Key Episode Highlights [S2E30] I Am Jethro